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Taking the fathers’ origins into account as well, 50.4 per cent of babies born in Boston had at least one foreign-born parent.

The figures come after Boston voted overwhelmingly in favour of Brexit in last year's referendum, with many there voicing fears over the level of immigration in the town.

A total of 75.6 per cent of voters in the town supported the Leave campaign - the highest figure in the UK.

The birth statistics show that South Holland followed Boston with 32 per cent of babies born to at least one non-UK born parent.

Lincoln came third with 29 per cent while East Lindsey had the lowest, with 8.3 per cent.

Matt Warman, MP for Boston and Skegness, said: "'It's common knowledge that thousands of people have come from abroad to live and make their homes in Boston - the fact that these new communities go on to have children in our local area is often testament both to their commitment to their adopted country but also to the unprecedented strain that our NHS is under. It's why I've continued to press for further investment in hospitals and also in schools, as well as in community integration initiatives. Lincolnshire's health budget is rising, but I believe it needs to rise further to deal with ongoing pressures.'

May Bradley, a local resident, said: “It doesn’t really surprise me as this is the society we live in today. We have a large Eastern European community so it is hardly a shock - give it another 10 years and it will be more like 75 per cent.”

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Gillian Turner, a small business owner from the area, added: “We have seen a huge influx in the migrant community but I wouldn’t have thought the amount of babies born to non-UK residents would be so high.”

The largest group outside British-born mothers was women from the EU, who had 43.0 per cent of all babies in Boston in 2016.

Across England and Wales, some 28.2 per cent of births were to mothers who were born outside of Britain.

Poland was the most common birthplace of mothers aside from Britain, while for fathers it was Pakistan.